Did you notice a big difference from the 3x3 itself?I put 1,000+ track miles on my DRZ with the 3x3 mod, K&N air filter, and full Yosh system before I put my jet kit in. It ran fine for me. (I do not ride the street with my DRZ...so, the throttle is "wide open" 95% of the time)
To be honest with you, I was disappointed when I put my jet kit in. I could not tell much difference.
Street riding might be a little different.